<?php
/*
 * Laconica - a distributed open-source microblogging tool
 * Copyright (C) 2008, Controlez-Vous, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

if (!defined('LACONICA')) { exit(1); }

require_once(INSTALLDIR.'/lib/settingsaction.php');
require_once(INSTALLDIR.'/actions/emailsettings.php');

class SmssettingsAction extends EmailsettingsAction
{

    function get_instructions()
    {
        return _('You can receive SMS messages through email from %%site.name%%.');
    }

    function show_form($msg=null, $success=false)
    {
        $user = common_current_user();
        $this->form_header(_('SMS Settings'), $msg, $success);
        $this->elementStart('form', array('method' => 'post',
                                           'id' => 'smssettings',
                                           'action' =>
                                           common_local_url('smssettings')));
        $this->hidden('token', common_session_token());
        $this->element('h2', null, _('Address'));

        if ($user->sms) {
            $this->elementStart('p');
            $carrier = $user->getCarrier();
            $this->element('span', 'address confirmed', $user->sms . ' (' . $carrier->name . ')');
            $this->element('span', 'input_instructions',
                           _('Current confirmed SMS-enabled phone number.'));
            $this->hidden('sms', $user->sms);
            $this->hidden('carrier', $user->carrier);
            $this->elementEnd('p');
            $this->submit('remove', _('Remove'));
        } else {
            $confirm = $this->get_confirmation();
            if ($confirm) {
                $carrier = Sms_carrier::staticGet($confirm->address_extra);
                $this->elementStart('p');
                $this->element('span', 'address unconfirmed', $confirm->address . ' (' . $carrier->name . ')');
                $this->element('span', 'input_instructions',
                               _('Awaiting confirmation on this phone number.'));
                $this->hidden('sms', $confirm->address);
                $this->hidden('carrier', $confirm->address_extra);
                $this->elementEnd('p');
                $this->submit('cancel', _('Cancel'));
                $this->input('code', _('Confirmation code'), null,
                             _('Enter the code you received on your phone.'));
                $this->submit('confirm', _('Confirm'));
            } else {
                $this->input('sms', _('SMS Phone number'),
                             ($this->arg('sms')) ? $this->arg('sms') : null,
                             _('Phone number, no punctuation or spaces, with area code'));
                $this->carrier_select();
                $this->submit('add', _('Add'));
            }
        }

        if ($user->sms) {
            $this->element('h2', null, _('Incoming email'));
            
            if ($user->incomingemail) {
                $this->elementStart('p');
                $this->element('span', 'address', $user->incomingemail);
                $this->element('span', 'input_instructions',
                               _('Send email to this address to post new notices.'));
                $this->elementEnd('p');
                $this->submit('removeincoming', _('Remove'));
            }
            
            $this->elementStart('p');
            $this->element('span', 'input_instructions',
                           _('Make a new email address for posting to; cancels the old one.'));
            $this->elementEnd('p');
            $this->submit('newincoming', _('New'));
        }
        
        $this->element('h2', null, _('Preferences'));
        
        $this->checkbox('smsnotify',
                        _('Send me notices through SMS; I understand I may incur exorbitant charges from my carrier.'),
                        $user->smsnotify);
            
        $this->submit('save', _('Save'));
        
        $this->elementEnd('form');
        common_show_footer();
    }

    function get_confirmation()
    {
        $user = common_current_user();
        $confirm = new Confirm_address();
        $confirm->user_id = $user->id;
        $confirm->address_type = 'sms';
        if ($confirm->find(true)) {
            return $confirm;
        } else {
            return null;
        }
    }

    function handle_post()
    {

        # CSRF protection

        $token = $this->trimmed('token');
        if (!$token || $token != common_session_token()) {
            $this->show_form(_('There was a problem with your session token. Try again, please.'));
            return;
        }

        if ($this->arg('save')) {
            $this->save_preferences();
        } else if ($this->arg('add')) {
            $this->add_address();
        } else if ($this->arg('cancel')) {
            $this->cancel_confirmation();
        } else if ($this->arg('remove')) {
            $this->remove_address();
        } else if ($this->arg('removeincoming')) {
            $this->remove_incoming();
        } else if ($this->arg('newincoming')) {
            $this->new_incoming();
        } else if ($this->arg('confirm')) {
            $this->confirm_code();
        } else {
            $this->show_form(_('Unexpected form submission.'));
        }
    }

    function save_preferences()
    {

        $smsnotify = $this->boolean('smsnotify');
        
        $user = common_current_user();

        assert(!is_null($user)); # should already be checked

        $user->query('BEGIN');

        $original = clone($user);

        $user->smsnotify = $smsnotify;

        $result = $user->update($original);

        if ($result === false) {
            common_log_db_error($user, 'UPDATE', __FILE__);
            $this->serverError(_('Couldn\'t update user.'));
            return;
        }

        $user->query('COMMIT');

        $this->show_form(_('Preferences saved.'), true);
    }

    function add_address()
    {

        $user = common_current_user();

        $sms = $this->trimmed('sms');
        $carrier_id = $this->trimmed('carrier');
        
        # Some validation

        if (!$sms) {
            $this->show_form(_('No phone number.'));
            return;
        }

        if (!$carrier_id) {
            $this->show_form(_('No carrier selected.'));
            return;
        }
        
        $sms = common_canonical_sms($sms);
        
        if ($user->sms == $sms) {
            $this->show_form(_('That is already your phone number.'));
            return;
        } else if ($this->sms_exists($sms)) {
            $this->show_form(_('That phone number already belongs to another user.'));
            return;
        }

          $confirm = new Confirm_address();
           $confirm->address = $sms;
           $confirm->address_extra = $carrier_id;
           $confirm->address_type = 'sms';
           $confirm->user_id = $user->id;
           $confirm->code = common_confirmation_code(40);

        $result = $confirm->insert();

        if ($result === false) {
            common_log_db_error($confirm, 'INSERT', __FILE__);
            $this->serverError(_('Couldn\'t insert confirmation code.'));
            return;
        }

        $carrier = Sms_carrier::staticGet($carrier_id);
        
        mail_confirm_sms($confirm->code,
                         $user->nickname,
                         $carrier->toEmailAddress($sms));

        $msg = _('A confirmation code was sent to the phone number you added. Check your inbox (and spam box!) for the code and instructions on how to use it.');

        $this->show_form($msg, true);
    }

    function cancel_confirmation()
    {
        
        $sms = $this->trimmed('sms');
        $carrier = $this->trimmed('carrier');
        
        $confirm = $this->get_confirmation();
        
        if (!$confirm) {
            $this->show_form(_('No pending confirmation to cancel.'));
            return;
        }
        if ($confirm->address != $sms) {
            $this->show_form(_('That is the wrong confirmation number.'));
            return;
        }

        $result = $confirm->delete();

        if (!$result) {
            common_log_db_error($confirm, 'DELETE', __FILE__);
            $this->serverError(_('Couldn\'t delete email confirmation.'));
            return;
        }

        $this->show_form(_('Confirmation cancelled.'), true);
    }

    function remove_address()
    {

        $user = common_current_user();
        $sms = $this->arg('sms');
        $carrier = $this->arg('carrier');
        
        # Maybe an old tab open...?

        if ($user->sms != $sms) {
            $this->show_form(_('That is not your phone number.'));
            return;
        }

        $user->query('BEGIN');
        $original = clone($user);
        $user->sms = null;
        $user->carrier = null;        
        $user->smsemail = null;        
        $result = $user->updateKeys($original);
        if (!$result) {
            common_log_db_error($user, 'UPDATE', __FILE__);
            $this->serverError(_('Couldn\'t update user.'));
            return;
        }
        $user->query('COMMIT');

        $this->show_form(_('The address was removed.'), true);
    }
    
    function sms_exists($sms)
    {
        $user = common_current_user();
        $other = User::staticGet('sms', $sms);
        if (!$other) {
            return false;
        } else {
            return $other->id != $user->id;
        }
    }

    function carrier_select()
    {
        $carrier = new Sms_carrier();
        $cnt = $carrier->find();

        $this->elementStart('p');
        $this->element('label', array('for' => 'carrier'));
        $this->elementStart('select', array('name' => 'carrier',
                                             'id' => 'carrier'));
        $this->element('option', array('value' => 0),
                       _('Select a carrier'));
        while ($carrier->fetch()) {
            $this->element('option', array('value' => $carrier->id),
                           $carrier->name);
        }
        $this->elementEnd('select');
        $this->elementEnd('p');
        $this->element('span', 'input_instructions',
                       sprintf(_('Mobile carrier for your phone. '.
                                 'If you know a carrier that accepts ' . 
                                 'SMS over email but isn\'t listed here, ' .
                                 'send email to let us know at %s.'),
                               common_config('site', 'email')));
    }

    function confirm_code()
    {
        
        $code = $this->trimmed('code');
        
        if (!$code) {
            $this->show_form(_('No code entered'));
            return;
        }
        
        common_redirect(common_local_url('confirmaddress', 
                                         array('code' => $code)));
    }
}